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Expired European patentEurope

A controllable pcm state machine user interface

EP 0673572 B1 · Applicant: NATIONAL SEMICONDUCTOR CORPORATION

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed December 6, 1993 and granted June 28, 2000. A European patent lasts at most 20 years from filing, so its term ended December 6, 2013.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by June 6, 2019.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledDecember 6, 1993
PublishedSeptember 27, 1995
GrantedJune 28, 2000
Term endedDecember 6, 2013
Application numberEP 94904401
Classification (CPC)H04L12/433

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedDec 6, 1993PublishedSep 27, 1995Patent grantedJune 28, 2000Term endedDec 6, 2013

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.